Clutch



(No Model.)

} o. AKERLEY & HORTON} CLUTCH.

Patented Jan. 8, 1895'! INVENTURE I WW M U. WVNW a mfi A E. a j Z%W O H F5 5 J0 l more MATENT OF ICE.

OLIVER L. AKERLEY AND CHARLES M. HORTON, or READING,

MASSACHUSETTS.

CLUTCH.

SPECIFICATION forming part of Letters Patent No. 532,258, dated January 8, 1895.

Application filed March 12, 1894.

T0 at whom it may concern:

Be it known that we, OLIVER L. AKERLEY and CHARLES M. HORTON, of Reading, in the county of Middlesex and State of Massachu setts, have invented certain new and useful Improvements in Clutches, of which the following is a specification.

This invention relates to clutches for con necting rotary machine elements, and the ob ject is to provide a device'possessing simplicity, durability, and strength of construction and adapted to be operated so as to limit the continued movement of the driven part to a single revolution, which is desirable in stamping machines and machines of like character.

The invention is illustrated in the accompanying drawings, which form part of the specification.

Figure 1 shows a longitudinal section of the clutch. Fig. 2 shows a cross-section takenon the line 2-2. of Fig. 1. Fig.3 shows a similar cross-section, the parts being under a different adjustment than in Fig. 2. Fig. 4 shows a section on line 44 of Fig. 1. Fig. 5 shows a sectional perspective view, the section being taken on the same line as Fig. 4 and one of the clutch-members being represented as broken away. Fig. 6 shows an end elevation of one of the clutch members. Fig. 7 shows asectional perspective view. Fig. 8 shows a perspective view of a gripping device. Fig. 9 shows an elevation of part of the rotary member which carries this gripping device, represented as broken away at one place to disclose a spring for actuating said gripping device.

In the drawings-the letter d designates a one of the rotary machine elements, which as here shown is a pulley and balance-wheel and is loosely mounted on the spindle of a shaft b. A ring or of durable material such as hardened steel is fastened in a recess of the pulley a, and is formed with an annular driving-flange a A block or sleeve 1) afiixed on the shaft 1) is turned down so as to fit within the ring a and have its peripheral surface flush with the outer surface of the flange 01. The said block b is formed with a radiallyextending recess b whose base portion 1) extends in the arc of a circle and one of whose side walls 11 extends parallel with a line drawn Serial No. 503,293- (No model.)

between the center from which the base portion I) is struck and the center of rotation, while the opposite sidewall 12 extends at an angle to such a line. A gripping device or dog a occupies the recess b and its inner end 0' is rounded in the arc of a circle to fit the base portion 19 of said recess. The said gripping device is formed with jaws c and c which embrace the flange a and whose confronting surfaces c and c extend'in the arcs of opposed circles. The sides of the dog 0 are parallel, and the said dog is movable in the recess b and when it abuts the wall 124 of the recess, the surfaces 0 and c of its jaws c and c are so disposed with relation to the annular flange a that the latter passes freely between the said jaws. When, however, the dog is moved away from the wall 5 the said surfaces 0 and e bind against the inner and outer surfaces of the flange a and said flange will then drive the collar band consequently the shaft Z).

A pocket (1 is formed in the collar Z) and receives a spiral spring d, which by bearing at one end against the base of said pocket, and at the opposite end against the side of the dog 0, tends to move the latter away from the wall 1) and establish an operative connection between the same and the flange a Means are here shown for automatically limiting the continued movement of the shaft 1) to a single revolution, and the devices are arranged as follows: A lever c is pivoted at one end to a fixed support, and carries a cushioned abutment or bumper e, which is designed to stand in the path of the dog 0, so that when the latter encounters said bumper it will be moved against thewall b of the recess b and consequently released from the driving-flange a A springfis arranged to sustain the lever e in positiomwith the bumper e in the path of the dog. A vertical rod 9 extends through an opening 6 in the lever e and is formed with a shoulder 9 arranged to take overa plate a fastened on the-upper side of the lever e. (See Fig. 3.) This rod g is connected with a treadle (not shown), and upon depressing this treadle the lever e will be moved downwardly and its bumper 6' carried out of the path of the dog 0, whereupon the spring 61 immediately throws said dog into connection with the driving-flange a and the shaft 19 is driven forward. A projection hon the collar 1) is arranged to strike the upward extending portion of the rod gand disengage the shoulder g from the plate 6. so that the spring f may return the bumper e into the path of the dog before the latter completes one revolution.

Other means than those here shown may be combined with the clutch for the purpose of limiting the continued movement of the driven part to a single revolution.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, isa 1. A clutch comprising in its construction a member having an annular driving-flange, a member having a radial recess with flaring sides and a pocket in one of said sides, a dog fulcrumed in said recess and provided with jaws which embrace the annular flange and have acting surfaces extending on opposed curves, said dog being movable in the recess to dispose its acting surfaces free from the annular flange when abutting one side of the recess, or to cause them to bind against the flange, and a spring contained in the pocket spring-actuated in a direction to produce the latter effect, and an abutment movable into and out of the path of the dog and spring held in its path, to limit the continued movement of the driven member to a single rotation.

In testimony whereof we have signed our names to this specification, in the presence of two subscribing witnesses, this 5th day of March, A. D. 189i.

OLIVER L. AKERLEY. CHARLES M. HORTON.

Witnesses:

A. D. HARRISON, CLARENCE LEONARD. 

